Brother International Innov-is NQ550PRW Operation Manual - Page 112
Checking machine operations
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Troubleshooting Turn the handwheel to check that the feed dogs move smoothly and do not contact the edges of the slots in the needle plate. 1 Correct position of feed dogs 2 Incorrect position of feed dogs Note • Be careful not to drop the removed screws in the machine. p Ibnosbebrtinthceasbeoablbiginnscwasiethsothtehat thmeark mark on the on the machine. a b a b • Align the and marks. CAUTION • Never use a bobbin case that is scratched, otherwise the upper thread may become tangled, the needle may break or sewing performance may suffer. • Make sure that you fit the bobbin case properly, otherwise the needle may break. Attach the needle plate cover according to step j in q "Cleaning the race" on page A-2. Check the condition of the needle, and then install it. r If the needle is in a poor condition, for example, if it is bent, be sure to install a new needle. • Refer to "Checking the needle" and "Replacing the needle" in the "Basic operations" section. CAUTION • Never use bent needles. Bent needles can easily break, possibly resulting in injuries. Note • After completing this procedure, continue with the following procedure in "Checking machine operations" to check that the machine is operating correctly. Memo • Since the needle may have been damaged when the fabric was caught in the machine, we recommend replacing it with a new one. ■ Checking machine operations If the needle plate has been removed, check machine operations to confirm that installation has been completed correctly. Turn on the machine. a 1 mark 2 mark 3 Bobbin case • Make sure that the indicated points are aligned before installing the bobbin case. Select stitch . b Note • Do not yet install the presser foot and thread. A-10